<template>
  <div class="article-container">
    <!-- 导航栏 -->
    <van-nav-bar
      class="page-nav-bar"
      title="黑马头条"
      left-arrow
      @click-left="$router.go(-1)"
    ></van-nav-bar>
    <!-- /导航栏 -->

    <div class="main-wrap">
      <!-- 加载中 -->
      <div class="loading-wrap" v-if="loadingFlag">
        <van-loading
          color="#3296fa"
          vertical
        >加载中</van-loading>
      </div>
      <!-- /加载中 -->

      <!-- 加载完成-文章详情 -->
      <div v-else-if="articles.title" class="article-detail">
        <!-- 文章标题 -->
        <h1 class="article-title">{{articles.title}}</h1>
        <!-- /文章标题 -->

        <!-- 用户信息 -->
        <van-cell class="user-info" center :border="false">
          <van-image
            class="avatar"
            slot="icon"
            round
            fit="cover"
            :src="articles.aut_photo"
          />
          <div slot="title" class="user-name">{{articles.aut_name}}</div>
          <div slot="label" class="publish-date">{{articles.pubdate | formatTime}}</div>

          <!-- <follow-user
           @updatefollowFlag="articles.is_followed = $event"
           :targetId="articles.aut_id"
           :followFlag="articles.is_followed">
          </follow-user> -->
          <follow-user
           :targetId="articles.aut_id"
           v-model="articles.is_followed">
          </follow-user>
        </van-cell>
        <!-- /用户信息 -->

        <!-- 文章内容 -->
        <div ref="articleContentRef" class="article-content" v-html="articles.content"></div>
        <van-divider>正文结束</van-divider>
        <article-conment @click-reply="onClickReply" :list='eventBusData' @updata-total="total = $event" :source="articleId"></article-conment>

         <!-- 底部区域 -->
          <div class="article-bottom">
            <van-button
              class="comment-btn"
              type="default"
              round
              size="small"
              @click="showComment = true"
            >写评论</van-button>
            <van-icon
              name="comment-o"
              :info="total"
              color="#777"
            />
            <!-- 收藏 -->
            <keep-article v-model="articles.is_collected" :keysId="articles.art_id"></keep-article>
            <van-icon
              color="#777"
              name="good-job-o"
            />
            <van-icon name="share" color="#777777"></van-icon>
          </div>
          <!-- /底部区域 -->
          <van-popup v-model="showComment" position="bottom">
            <post-conment @post_success="onPostSuccess" :target="articles.art_id"></post-conment>
          </van-popup>
      </div>
      <!-- /加载完成-文章详情 -->

      <!-- 加载失败：404 -->
      <div v-else-if="is404" class="error-wrap">
        <van-icon name="failure" />
        <p class="text">该资源不存在或已删除！</p>
      </div>
      <!-- /加载失败：404 -->

      <!-- 加载失败：其它未知错误（例如网络原因或服务端异常） -->
      <div v-else class="error-wrap">
        <van-icon name="failure" />
        <p class="text">内容加载失败！</p>
        <van-button class="retry-btn" @click="loadArticleInfo">点击重试</van-button>
      </div>
      <!-- /加载失败：其它未知错误（例如网络原因或服务端异常） -->
    </div>
    <van-popup v-model="replyshowFlag" position="bottom" :style="{ height: '80%' }">
      <reply-conment v-if="replyshowFlag" @replyclose="replyshowFlag = false" :replyData="replyData"></reply-conment>
    </van-popup>
  </div>
</template>

<script>
import { getArticle } from '@/api/article'
import { ImagePreview } from 'vant'
import FollowUser from '@/components/follow-user'
import KeepArticle from '@/components/keep-article'
import ArticleConment from '@/components/article-comment'
import PostConment from './post-comment'
import ReplyConment from './reply-comment'

export default {
  name: 'ArticleIndex',
  components: {
    FollowUser,
    KeepArticle,
    ArticleConment,
    PostConment,
    ReplyConment
  },
  props: {
    articleId: {
      type: [Number, String, Object],
      required: true
    }
  },
  data () {
    return {
      articles: {},
      loadingFlag: false,
      is404: false,
      isFollowLoading: false,
      total: 0,
      showComment: false,
      eventBusData: [],
      replyshowFlag: false,
      replyData: {}
    }
  },
  computed: {},
  watch: {},
  created () {
    this.loadArticleInfo()
  },
  mounted () {},
  methods: {
    async loadArticleInfo () {
      this.loadingFlag = true
      try {
        const { data: res } = await getArticle(this.articleId)
        if (Math.random() > 0.8) {
          console.lg(1)
        }
        this.articles = res.data
        this.loadingFlag = false
        this.$nextTick(() => {
          this.loadingImage()
        })
        console.log(res.data)
      } catch (err) {
        if (err.response && err.response.status === 404) {
          this.is404 = true
        }
        this.loadingFlag = false
        console.dir(err)
      }
    },
    loadingImage () {
      const images = this.$refs.articleContentRef.querySelectorAll('img')
      // console.log(images)
      const arr = []
      images.forEach((item, index) => {
        arr.push(item.src)
        // console.log(arr)
        item.onclick = () => {
          ImagePreview({
            images: arr,
            startPosition: index
          })
        }
      })
    },
    onPostSuccess (data) {
      this.showComment = false
      console.log(data)
      this.eventBusData.unshift(data)
    },
    onClickReply (data) {
      console.log(data)
      this.replyData = data
      this.replyshowFlag = true
    }
  }
}
</script>

<style scoped lang="less">
.article-container {
  .main-wrap {
    position: fixed;
    left: 0;
    right: 0;
    top: 92px;
    bottom: 88px;
    overflow-y: scroll;
    background-color: #fff;
  }
  .article-detail {
    .article-title {
      font-size: 40px;
      padding: 50px 32px;
      margin: 0;
      color: #3a3a3a;
    }

    .user-info {
      padding: 0 32px;
      .avatar {
        width: 70px;
        height: 70px;
        margin-right: 17px;
      }
      .van-cell__label {
        margin-top: 0;
      }
      .user-name {
        font-size: 24px;
        color: #3a3a3a;
      }
      .publish-date {
        font-size: 23px;
        color: #b7b7b7;
      }
      .follow-btn {
        width: 170px;
        height: 58px;
      }
    }

    .article-content {
      padding: 55px 32px;
      /deep/ p {
        text-align: justify;
      }
    }
  }

  .loading-wrap {
    padding: 200px 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #fff;
  }

  .error-wrap {
    padding: 200px 32px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-color: #fff;
    .van-icon {
      font-size: 122px;
      color: #b4b4b4;
    }
    .text {
      font-size: 30px;
      color: #666666;
      margin: 33px 0 46px;
    }
    .retry-btn {
      width: 280px;
      height: 70px;
      line-height: 70px;
      border: 1px solid #c3c3c3;
      font-size: 30px;
      color: #666666;
    }
  }

  .article-bottom {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    justify-content: space-around;
    align-items: center;
    box-sizing: border-box;
    height: 88px;
    border-top: 1px solid #d8d8d8;
    background-color: #fff;
    .comment-btn {
      width: 282px;
      height: 46px;
      border: 2px solid #eeeeee;
      font-size: 30px;
      line-height: 46px;
      color: #a7a7a7;
    }
    .van-icon {
      font-size: 40px;
      .van-info {
        font-size: 16px;
        background-color: #e22829;
      }
    }
  }
}
/deep/.van-icon-arrow-left {
  color: #fff;
}
</style>
